Wurth Elektronik Surface LAN Ethernet Transformer, 85 °C 12.7 mm, -40 °C 9.27mm

This LAN Ethernet transformer provides galvanic isolation and signal coupling for 10/100 Base‑T networks in surface‑mount assemblies. It is intended for integration where isolation, constrained board space and standard Ethernet signalling between 1MHz and 100MHz are required. The component operates across a wide temperature range suitable for industrial contexts and meets recognised flammability and Ethernet power‑delivery standards.

• 120 μH inductance reduces common‑mode noise for clearer signals
• 1:1 turns ratio maintains signal amplitude for balanced lines
• 1500 Vrms isolation protects against ground potential differences
• Insertion loss -1.0dB preserves signal integrity across the bandwidth
• Solder termination enables robust assembly for automated production

• Suitable for integrating into 10/100 Base‑T network ports
• Ideal for PoE solutions complying with IEEE 802.3at
• Used with industrial switches operating in harsh temperatures
• Can be used for board‑level isolation in LAN front‑ends
• Suitable for surface‑mount manufacturable Ethernet interfaces

It operates from 1MHz up to 100MHz to cover common Ethernet signalling.

The component is rated to function between -40°C and 85°C for varied environments.

It carries UL94‑V0 flammability recognition and meets IEEE 802.3at requirements.

It is a surface‑mount device with solder termination suited to reflow processes.